Tire-making mechanism



Feb. 7, 192s. Lamm I l w., c. sTEvEN TIRE MAKING nmcmmm Filed Jan. 4, 19in? N .Shaw

. y orwell be s Feb.v 7, 192s. l

W. C. STEVENS TIRE MAKING MEGHANISM Filed Jan 4 9 sums-sheet 2 QWN Feb. 7,1933.

w. c. STEVENS TIRE MAKING MECHANISM Filed Jan. 4, 1923 9 Sheets-Sheet W. C. STEVENS TIRE MAKING MECHANISM Feb. 7, 1928.

'Filed Jarm, 1923' 9 Sheet'smsheet 4' IlIIIIIIIlIlllllllllllllulnumww. c. STEVENS TIRE MAKING uEcHANxsM Filed Jan.4, 192'3 v .g Sheng-sheet 5 Feb. 7, 1928.

Feb.' 7, 1923 W. C. STEVENS TIRE MAKING MECHANISM Filed Jan.4. 1923 9 shggtglsheet 6 a A89 89 K Feb. 7, 1928.

w. c. STEVENS TIRE 'MAKING MEGHANISM Filed Jan. 4, 1923 9 Sheets-Sheet 7 Feb.-` "Z, 1928.

W. C3. STEVENS TIRE MAKING MECHNISM 9 Sheets-Sheet 9 Filed Jn. 4, 1923 m y 5 a n .w

mechanism, as it is shown in Figure 1, loolring toward the center thereof. l

Figure ti is e plan vienT of a stitclier mechanism embodied'in my invention;

Figure i is on elevational View looking et one side of the stitcher mechanism;

Figure 8 is a plain 'view illustrating the manner in which my -stitchcr mechanism operates against a tire building core;

Figure 9 is a. plan view illustrating the operation of my stitcher mechanism es the stitehers round the bead portions ci a tire;

Figure 10 is e, pien view illustrating the operation of trimmer instriunentalities ernodied in my stitcher mechanism; Figure 11 is e. detail view showing otivo speed defiice for advancing the stitclier mechanism toward the core.

Figuredi? is a side elevational view of the structure shown in Figure 11;

Figure'll a plan view illustrating the tire stripping devices forming e part of Tiny novel mechanism;

'liiejure lll is nn elevotioncl vievv of an udj'ustable support forming n port of the tire stripping devices; sind Figure l5 is n plan View, partly in section, illustrating' the operation' of the stripping devices.

Upon reference to the drawings and par ticularly `to `Figures 1 and 2, it Will be seen that my present invention embodies ope-- culiar form of bese l constructed to support, in thisinstance, two core stands, 2 sind 3 respectively, in opposite relation, and upon cach side of e common driving unit fi and e. common fabric supplying turret 5. n

The core stands 2 and 3 are, in each instance, offset fromthe longitudinal center line of the base 1 and located upon oppo site sides of said center line. The oflset po stion of the stands'enablesl me to use en individual drive shaft forrotatin'g each core, to drive both shafts from a common variable speed driving unit, previously referred to :is 4., ond to position the driving unit intermediate the core stands nud the shafts to thereby procure a compactly arranged mechanism, ell ot' which will be se'enby reference to Figures l and2. The core stands 2 and 3 maybe of any suitable construct'ion'edapted `to support-n rotary clinch, such as that indicated :it 6-,-for carrying' the usual tire building core 7. Prefierobly the core stands 2 ond 3 are mounted* to reciprocate longitudinellv ot the bose 1 in parallel planes so that they .may be adjusted relative to the turret Fi to properly7 space different sizes of cores therefrom. For this purpose I provide rack and ninion1 devices 8 below each stand operate by 1 nominallyV rotatable shafts 9.

f'lhe driving unit e'. comprises the following. Each chuck 6 isr rotated by an individunl driven shaft 10. The shafts 10 exshafts 1G. naled intermediate the shafts 1U and upon :cesareo tend horizontally toward the transve'e center of the base 1 and are disposed in pnr aliel relation upon opposite sides thereof. it their outer ends shafts. 1G :1re each con nected by a series oi' suitnbl f arranged bev eled gears 1 1 to one of the chucks (l, the goers being adapted to permit adjustment of the stende 2 :1nd longitudinally of their respective shafts. A t their inner ends the shafts l() are driven by individual speed change devices 12 and reversing devices 13. Esch speed change device includes s hi rh speed clutch 1d and n low speed clutch 15 arranged to clutch or release a shaft 16. No particular forni of clutch is essential to my invention. in the present instance, I have indicated e. form of clutch adopted to clutch or release the shaft lo when said clutches nre engaged by sl' ling sleeves lo unen the The shafts 16 are suitah y jour- Vopposite sides of c constzmtly rotating shaft i?. A. gear 'train 18 couples the clutches 1l to be rotated in unison by the shaft 17 and u simi ar gear train 19 connects the clutches l5 for operation in atlilie manner. A mo tor 2G and gear train 21 rotate the shaft 17. Shafts 16 are each geared at one end to one oi the shafts 10, es at 22, so that the cores 7 oro rotated in the direction indicated by the arrows. A sprocket and chain connection 23 connects each shaft 16 with one of tho shafts 10 for driving the cores 7' Clutchesfl ere arranged upon the shafts 16 to clutch the sprocket and chain connections to said shafts when they are driven at either speed so that the cores may he rotated reversely at high or low speed. This reversing feature is particularly` advantageous when the operators are applying finishing strips, bead rings, etc. to the carcass and on ahles them to Work quicklyj es will be npperent to those skilled in the art.

Adjacent each core stand 2 and 3, two series of pedals are arranged for operating the cores 7 from the driving unit 4. The

pedals are identically arranged for euchcore stand, hence `a description of the pedals forthe let-hand core stand- Will suffice here 1n. Each series comprises three pedals, the

first series 25 being arranged 'so that an operator may actuate the driving unit from 'the front of th e core, Whereas the series 25* the driving unit' in conjunction with a stitcher mechanism, presently described. Series 25 includes a high speed pedal 26 adapted, when depressed, to rock a pivoted bell crank pedal 27 in one direction. One arm of the'bell crank pedal 27 is connected bye link 28 to one end of a rock shaft 29 which at its opposite end is connected by e link 30 to a rocher arm 31. Rocker arm 31 is errang'cdgto shiftone of the sleeves reversely.

55 Ivshaft 10 b frame is provided with a hand lever 65 piv otcd intermediate its ends, as at 66,11pon the frame. (lne end of the lever (55 is pivotally connected to one end ot' u link 67, the other end oi the link being pivoted to the adjacent bracket 45. The disposition of the lever 65 und the link 67 is such that lever (55 may be swung around its pivot 6G, when the traine 52 is in lowered ppsition to raise Suid frame 10 and lock the levcrti and the link 67 with their pivot points beyond u dead center position. In this position of the trame, n handle 0S upon the lever (S5 engages the link v67 and holds the trame in raised position. .ln

thc drawings, see Figure 3, one frame 5:2 is

shown in raised position in broken lines. Upon the table 42 individual stitcher units, G9 :ind 69 respectively, are provided for each core. The stitcher units being identical,

a description of one will suliice herein. I

`will describe the unit 60 ut the left ot' the machine, us shovel-i in l `igures l and 5 to l0 inclusive.

Stitching unit 69 com rises aliorizontal carriage 7 0 guided upon t ie base l for movement toward or from the coretnd 2. The carriage is moved toward the stahd 2 by parallel racks 71 secured upon its lower face and meshing With toothed pinions 72 fixed upon a shaft 73: Shaft 73 isiournaled upon the table 42 and isdriven by a sprocket and.

chain connection 74 tota similarly located shaft 75. -Shat 75 isy designed to be mechanically driven in a rhamier presently described, to 'move the carriage 70 toward the core2 but is preferably rotated to move the carriage rearwardly by a hand Wheel 76 upon one end thereof. For driving the carriage forward, I provide an oscillating lever 77 .4 adjacent the hand wheel 7 6 pivoted intermediate its length to rock upon a driven stud shaft 78. The lever 77 carries-two friction wheels 79 and 80 respectively' of different sizes, the wheels being mounted so that one 'l5 wheel engages a groove 8l in the periphery` lof the wheel 7G when the leven is rocked in either direction. These wheels 79 and 80 constitute auxiliary high and low speed drives respectively for moving the carriage 79 toward the core stzfhd.: They -are geared to the ,stud shaft 78,as at 82, to both rotate in the it driven by either the high'speed clutches 14 or by the low speed clutches 15.

A pair of normally parallel stitcher arms 87 are pivoted at their rear ends upon the carriage to project longitudinally there 55. of over the front edge ofthe carriage and receive the core between their proj ectinff ends. AThe stitcher arms are swung about. their pivots 88 to press a pair of rotatable sutcher discs 89 against the sides of the core by means of individual rocker arms 90, euch ot' which is pivoted upon the carriage 70, as shown at- 91. The arms 90 also extend longitudinally of the carriage und at their i`or- Ward ends are connected to the intermediate portions of the stitcher arms 87 by pivoted bolts 92 and springs 055 arranged so that 4the stitehers Si.' 1re yeldingiy pressed against the sides of the core 7. The arms 00 ure rocli'ed in opposite directions to position the stitchers against the core by individual sliding melts 0l that extend transversely oi the carriage toward one edge thereof. Each ruoli 0l is pivoted at its inner end to one of the arms 00. A pair of toothed pinions 05 mesh re spcetively with thc racks tlfl and are fixed 'respectively upon a shaft 90 arranged 'to be rocked by a hand lever 97. As thc stitehers engage the core, the hand lever 97 und shaft ll are rocked to actuate the arms 00 and press the stitchers against the sides thereof with a uniform pressure. The mechanism for operating the stitchers is easily handled to obtain the correct pressure of the stitchers and can. be operated with one hand While the .lever 77 is being held in position to move the carriage forward at either high or low speed. An operator soon becomes more skilled with th's: form of mechanism than with mechant cally pressed stitchers with which it is diflicillt to obtain the correct degree of ,pressure and to prevent injury to the fabric.

The stitchers 89 are rotatably mounted upon sleeves S9* which aro arranged to swing about vertical studs 98 to present them at the desired angle against the sides of the core. Each stud carries n toothed pinion 00 which meshes with the forward end of a. ruck lm'r V100 carried by euch arm 87. The racks 100 are mounted to reciprocate u )on the firms 87 and have their rear ends nrljustahly aflixed in blocks 101. Blocks 101 are mounted to slide longitudinally of the arms 87 in guides 102 thereon and are actuated by a cross head 103. The cross-head 103 is guided, ns :it 104,

to reciprocate upon the carriage vlongitudinally of and between `the arms S7 and is connect-ed to the blocks 10i so that they move with the arms 87 about the pivots S8 of the latter. A crank shaft 105 is arranged updn the forward edge of the carriage to be rocked by e. hand lever 106. A detcnt 107 upon the hand lever 106 engages u rack 108 to hold the shaft in any desired position. One portion 109 of the crunk shaft 105 is connected to the cross head 103 by a link 110, so that when the crank shaft is rocked in either direction, the cross head will be reciprocated to move the blocks 101 and the rack bars 100 and swing the discs 89'in the' desired position relative to th core 7. Trimming tools 8. In mechanism of the cines described, core supporting means, :i reciprooahie einen er carriage, n. stteher Supporting firm upon the carriage, a rotatable niounting upon the erm, a stitcher upon the mounting', n cutting element upon the mounting, und moons for rotating the mounting. i

9. In mechanism ot' the class described, in combination, core supporting menne, ii` reeiproeahle stitcher carriage, n, stitehei' supporting erin mounted to swing upon the carriage, nJ rotatable stitcher mounting upon the arm, n. stitcher upon the mounting, u, cutting element- `upon the mounting, a reoiprocnble elen'ient upon the carriage, nJ ronneetion between the element :unl the mounting, und means for reciprocating; the clement and locking it against movement upon the carriage.

l0. In mechanism of the class described, core supporting means :L reciproenbie Stitch er oni-ringe, :i stitol'ier supporting" urm mounted to swing upon-the carriage, n ro tateble n'lounting` upon the stitcher erin, u stitoher upon the mounting, n cutting ele-- ment upon the mounting, means :t'or swing ing the arm, and means for rotating the mounting and looking it against rotation.

ll. In mechanism of the class described,

core supportiin;r means, a, reeiproeeble .Cstitcher carriage, :i stitcher supporting: erm mounted to swing upon the ooi-rione, e, roeleel arm upon the carriage yiclilingly connecked to the first erm, :means for rocking the arm, :L rotatable mounting upon the sttoher firm, n stitcher upon thc mounting. e. cutting element upon the mountine', nini means for rotating the, Inountine'nno loel ing it against rotation. i

l2. In a tire making machine, :i core.` en arm `movable radially :1nd axially of thc core, a stiiching rolnier and n trioin'iingi knife on said erin, nml means operable to present, either the roller or the, knife selectively to the core.

13. In 'n tire making machine, a core, nn arm movable radially oll the core, n rotatable mounting' in the enel of the urm, n stitehcr and :i triniminglmife carried zit'tiifferen; points on sind mounting, und means to ro- Lesieee lintethe mounting to present the otitolier nt different nngi'les with reepeot. to the core or io 1iresent the knife to the core.

jfl. lin tire inziliii'rei mnohine, rripositely clisposecl oores, .fi turntable between tl'ieoree, iiibriesupply rollers and stretching rollere niovnhly inounteu on and monuhle with the turntable, means 'to (.lri'r'el the cores,` unil driving mechanism from the core rlriring: ineens :ulepteel to nciuete the streiehini; rollers when the rollers-l :ure moved to n posi tion on the turntnl'ile in -which they will engege with seid driving'meclioniem.

l5. in :z tire making machine, opposiizely clisposecl cores, a turntable between the cores, uhiio supply rollers und stretchingr folleto oni'ijieijl by and mom-ble on the turntable io be positioned in'nlignmcnt; with anello he operable toward either core, means to drive the cores, diivingg mechanism from the core driving .ineens adapted to nouute ihostretchine," rollers, und Ineens to move the f'stretching rollers into and out; oi" engagenieno with the seid driving meehnnieni.

.'lG. In zr tire melting machine, oppositely (lispoeerl cores. Incolninism for driving@ the cores. n turntable between the cores, einoeecl gearing adjacent. cneh Core, streehing rollers on the turntable mounted to move there with nul nino movable thereon into opere.- tii'e relnlion 'with either core, gearfson the turntable for driving the stretehinp; rollers` said ,gears being movable on the table. to uml from inet-hing relntion with the exposed gearing, :md means to mesh the inst numeri gen1-s with the exposed gearing.

l?. in a Lire making mechne, o ipositely disposed driving mechanism for the Coree. n turntable. between the cores, enpoeeel gem'w ing` actuated by the core driving mechanism, nhrie @implying enel stretching rollers on the turntable bodily movable therewith and also movable relatively thereto when poni t-ionerl et either core, gearing on the turntnlole for driving the stretching rollers, und menus to raise or lower tilieigcoiing on the nrntnblo to Connect or'tliseonneci; it from 'the exposed gearing.

WlLLAli/I C. STEVENS. 

